Limits of Phase Noise Suppression in OFDM

We introduce two independent approaches for phase noise suppression. The dominant effects, responsible for the degradation of an OFDM system performance, if phase noise is present, are identified. We found out, that the system performance is strongly influenced by certain phase noise realizations, which cause burst errors, resulting in the performance error floor. Consideration of the system capacity in the presence of phase noise, motivates the idea, that bit interleaving can significantly improve the system performance. For systems where interleaving delay is a critical issue, we propose, as a second approach, an iterative phase noise suppression algorithm. Simulation results in terms of packet error rate (PER) show, that both bit interleaving and iterative algorithm are capable to significantly suppress the phase noise.